Atomic Structure Chemistry AQA GCSE
- Created by: Caitlinyx
- Created on: 24-04-13 22:12
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- Atomic Structure
- Atoms
- Nucleus
- Neutrons - a neutral charge
- Protons - a postative charge
- Electrons - a negative charge
- Nucleus
- Atomic Number and the Periodic Table
- The number of protons is the atomic number
- The elements on the periodic table are arranged in atomic number order
- If you are told the atomic number is 8, it has 8 protons and is the 8th element on the table, so it is oxygen
- You read the table from left to right, from bottom to top
- Mass Number
- The number of protons and neutrons in the nucleus is called the atomic mass
- If an element has 4 protons and 5 neutrons, it has an atomic mass of 9
- Given the atomic number and the mass number you can work out how many protons, neutrons and electrons an element has
- Number of neutrons = Mass number - Atomic number
- Atoms
- Overall charge 0
- Protons - a postative charge
- Neutrons - a neutral charge
- Electrons - a negative charge
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